Worcester Bosch 12Ri Question?

[bennc]

Hi there
Not really a problem just some advice needed please. I've had a quote in to replace my 10 year old Baxi solo boiler with a Worcester Bosch 12Ri regular condensing boiler. I live in a 1930's 3 bed semi with one bathroom and largish rooms. The house has 7 radiators in total. Will this boiler be up to the job? Thanks

 

[gas4you]

Depends on what all the radiator heat outputs add up to. If no more than about 9Kw, then 3 Kw for HW then it will be ok.

Personally I would recommend having a system boiler fitted rather than staying with an open vent model.

 

[superdupergasman]

I would say this might be slightly undersized, you would be better to future proof it and fit an 18 - 20kw model then if you upgrade rads or add extra it will still be ok.

 

[simond]

The problem with this model is that the larger sizes have to be fitted all the way to the boiler with 22mm gas as a minimum. Manufacturer MIs, non negotiable.

If the OP has a 15mm gas service sprouting out of a tiled kitchen floor the job suddenly gets a lot more complex. And expensive.

If the old boiler was 12Kw and it carried out its duty in sub zero temperatures, then a 12Kw replacement will do. OP hasn't told us this vital piece of the jigsaw.